We present time-resolved measurements and calculations of Liand He-lke satellites in a 20W A aluminium plasma created with a 12 ps KrF laser at intensities of up to IOL6 Vi cml.The evolution of the plasma at early times following the laser beam is inferred from the ratio of two satellite lines which have the advantage of small optical thicknesses compared to monance lines. Hydrodynamic simulaIions and time-dependent non-local thermodynamic equilibrium non-^^) calculations of the salellite intensity ratios compare favourably wirh experimental results for the incident laser intensities used.
New facilities for XUV laser research have recently been brought into operation at the SERC Rutherford Appleton Laboratory in the U.K. The new apparatus provides irradiation of targets at power levels of more than 1 TW in line focus geometry with length up to 2 cm and width down to 25 μm. In addition new subnanosecond time-resolved XUV diagnostics have been developed using streak cameras coupled to aperiodic grazing incidence diffraction gratings, producing a dispersed spectrum in a flat field. A consortium of U.K. research groups has been using the new facilities to study and develop XUV lasers based on recombination.
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